882 Video Test Instrument User Guide (Rev A.35) 385
I2CW (OUT1:I2CW, OUT2:I2CW, VGA:I2CW)
I2C port Write
Class EDID and DDC control
Description Writes raw binary data data using a specified I2C protocol. This command writes data to
the specified connector, bus and device using the I
2
C bus. If no connector is specified, the
query defaults to OUT1 or VGA depending on the active output. All numeric parameters
are given in ASCII HEX.
Note: EDID-compatible receivers use EPROMs with single-byte or double-byte
addresses. The I2CW command uses different parameters depending on the EPROM type.
Important: When writing data with this command, ensure you send only 8 bytes of data at
a time. This is necessary since most EPROMs do not have a larger memory buffer.
Command syntax
(EPROM with
single-byte
addresses)
connector:I2CW bus_name i2c_address offset data
Command syntax
(EPROM with
double-byte
addresses)
connector:I2CW eprom1 i2c_address offset #_of_bytes data
Command syntax
(device protocol)
connector:I2CW bus_name i2c_address offset data
connector
OUT1, OUT2 = HDMI OUT 1 or HDMI OUT 2 connector
VGA = VGA connector
bus_name (optional - text)
device queried (eprom, eprom1, TV, DT, HT1, HR)
i2c_address (hex)
i
2
c bus address (A0, A1,...)
offset (hex)
address offset (in bytes)
data (hex)
the data that you want to send to the register
Example 1 This example writes two bytes of E-EDID data, using the I2C e_ddc protocol.
i2cw eprom a0 80 2 FFFF
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